Information processing device, display switching method and program

ABSTRACT

There is provided an information processing device including: a light emitting unit to supply light to an operating means mounted on an IC card, the operating means being capable of switching display contents on a display unit of the IC card by a potential difference occurring due to photoelectric conversion; a communication unit to transmit given data to the IC card for causing the IC card to record the data; and a light emission adjusting unit to cause the data recorded on the IC card through the communication unit to be displayed on the IC card by adjusting the number of times of emitting light or a light emitting pattern from the light emitting unit.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an information processing device, a display switching method and a program.

2. Description of the Related Art

IC cards are widely used today that are capable of recording a large volume of information by incorporating semiconductor memory such as RAM, ROM or EEPROM. Various kinds of information such as balance information (remaining value) for electronic payments, electronic ticket information for transportation or amusement facilities, or coupon information used for shopping, for example, are written to IC cards through a reader/writer.

Instances of technological development for enhancing the convenience of IC cards are as follows. Japanese Unexamined Patent Application Publication No. 2003-208582, for example, discloses an IC card that has a display device such as an electronic paper or an LCD panel on its surface and is thus capable of displaying recorded information for a user. Further, Japanese Unexamined Patent Application Publication No. 2008-21176, for example, discloses an IC card that includes a means of generating a power by photoelectric conversion such as a solar battery and is capable of displaying information on a display device even at a distance from a reader/writer with use of a power generated by the power generating means.

On the other hand, the amount of information that can be displayed at a time on a display device mounted on an IC card is generally smaller than the amount of information that can be recorded on the IC card. Therefore, in some cases, an operating means for displaying desired information among a plurality of pieces of recorded information is mounted on an IC card.

SUMMARY OF THE INVENTION

Assume, for example, the case of writing some information to an IC card by using a reader/writer (e.g. the case of issuing an electronic ticket etc.). In such a case, if it is possible to display recorded information seamlessly on the IC card after writing processing of the information to the IC card, an operation for confirming success or failure of the writing processing becomes unnecessary, which enhancing the convenience for a user.

In light of the foregoing, it is desirable to provide a novel and improved information processing device, display switching method and program that enable information written to an IC card to be displayed on the IC card without demanding an operation by a user.

According to an embodiment of the present invention, there is provided an information processing device including a light emitting unit to supply light to an operating means mounted on an IC card, the operating means being capable of switching display contents on a display unit of the IC card by a potential difference occurring due to photoelectric conversion, a communication unit to transmit given data to the IC card for causing the IC card to record the data and a light emission adjusting unit to cause the data recorded on the IC card through the communication unit to be displayed on the IC card by adjusting the number of times of emitting light or a light emitting pattern from the light emitting unit.

The light emitting unit may be capable of supplying light to the operating means by a first light emitting pattern for driving the display unit of the IC card and a second light emitting pattern for switching display contents on the display unit of the IC card.

The information processing device may further include an IC card holding unit to hold the IC card at a position where light can be supplied from the light emitting unit to the operating means of the IC card and the display unit of the IC card is visible from outside.

The information processing device may further include a control unit to determine a write location for the data on a memory of the IC card based on contents of the memory read from the IC card through the communication unit.

The light emission adjusting unit may acquire the write location for the data from the control unit and determines the number of times of emitting light or the light emitting pattern from the light emitting unit according to the acquired write location.

The light emission adjusting unit may stop supply of light from the light emitting unit while the communication unit communicates with the IC card.

The control unit may stop communication between the communication unit and the IC card while light is supplied from the light emitting unit to the operating means of the IC card.

The information processing device may further include an image processing unit to determine whether writing of the data to the IC card succeeds or not by verifying an image obtained by imaging display contents displayed on the IC card against the data recorded on the IC card.

According to another embodiment of the present invention, there is provided a display switching method including the steps of transmitting given data to an IC card through a communication unit for causing the IC card to record the data, supplying light from a light emitting unit to an operating means mounted on the IC card and capable of switching display contents on a display unit of the IC card by a potential difference occurring due to photoelectric conversion and causing the data recorded on the IC card to be displayed on the IC card by the number of times of emitting light or a light emitting pattern adjusted according to a write location for the data.

According to another embodiment of the present invention, there is provided a program causing a computer controlling an information processing device including a light emitting unit to supply light to an operating means mounted on an IC card, the operating means being capable of switching display contents on a display unit of the IC card by a potential difference occurring due to photoelectric conversion to implement functions including a communication unit to transmit given data to the IC card for causing the IC card to record the data and a light emission adjusting unit to cause the data recorded on the IC card through the communication unit to be displayed on the IC card by adjusting the number of times of emitting light or a light emitting pattern from the light emitting unit.

According to the embodiments of the present invention described above, it is possible to provide the information processing device, display switching method and program that enable information written to an IC card to be displayed on the IC card without demanding an operation by a user.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view showing an information processing device according to an embodiment.

FIG. 2 is a schematic view showing an example of an appearance of an IC card related to the present invention.

FIG. 3 is a block diagram showing an example of a configuration of an IC card related to the present invention.

FIG. 4 is an explanatory view showing an example of a partial data structure of data recorded on card memory.

FIG. 5 is an explanatory view showing an example of a data structure of data recorded on display memory.

FIG. 6 is a sequence chart showing an example of a flow of display processing by an IC card related to the present invention.

FIG. 7 is a block diagram showing an example of a configuration of an information processing device according to an embodiment.

FIG. 8 is a schematic view showing an IC card being held by an information processing device according to an embodiment.

FIG. 9 is a schematic view showing the IC card being held when viewed from the direction A of FIG. 8.

FIG. 10 is an explanatory view to describe light emitting patterns of a light emitting unit.

FIG. 11 is a flowchart showing an example of a flow of a display switching processing by an information processing device according to an embodiment.

DETAILED DESCRIPTION OF EMBODIMENT

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the appended drawings. Note that, in this specification and the appended drawings, structural elements that have substantially the same function and structure are denoted with the same reference numerals, and repeated explanation of these structural elements is omitted.

A preferred embodiment of the present invention will be described hereinafter in the following order.

1. Outline of Information Processing Device According to an Embodiment

2. Explanation of IC Card Related to the Present Invention

-   -   2-1. Appearance of IC Card     -   2-2. Internal Configuration of IC Card     -   2-3. Exemplary Data Structure     -   2-4. Display Processing by IC Card

3. Configuration of Information Processing Device According to an Embodiment

4. Flow of Display Switching Processing According to an Embodiment

5. Summary

<1. Outline of Information Processing Device According to an Embodiment>

An outline of an information processing device 10 according to an embodiment of the present invention is described hereinafter with reference to FIG. 1.

FIG. 1 is a schematic view showing the information processing device 10 according to the embodiment. FIG. 1 also shows an IC card 20 capable of communicating with the information processing device 10.

Referring to FIG. 1, the information processing device 10 includes an IC card holding unit 12, a display unit 14 and a key input unit 16 appearing on its outside, for example.

The IC card holding unit 12 holds the IC card when the information processing device 10 writes given information such as balance information, electronic ticket information or coupon information into the IC card. The depth of the IC card holding unit 12 is adjusted in such a way that a display unit of an IC card being held by the IC card holding unit 12 is visible from the outside of the information processing device 10, as described in detail later. Although the shape of the IC card holding unit 12 is a pocket-like shape to which an IC card can be inserted from above as an example in FIG. 1, the shape of the IC card holding unit 12 is not limited thereto and may be another shape.

The display unit 14 displays given information, such as information related to control of the information processing device 10, information read from an IC card or information written to an IC card, to a user.

The key input unit 16 includes a button, a switch, a lever, a key or the like for a user to operate the information processing device 10. The display unit 14 and the key input unit 16 may be integrated with use of a touch panel or the like, for example.

Further, an external communication device that allows the information processing device 10 to communicate with an external device, a printing device that prints out given information onto a paper medium (both not shown) or the like may be additionally mounted on the information processing device 10 if needed.

Although FIG. 1 shows a portable electronic ticket issuing machine as an example of the information processing device 10, the information processing device 10 is not limited to such an example. For example, the information processing device 10 may be any reader/writer for an IC card, such as a stationary electronic ticket issuing machine, an electronic payment terminal or an electronic coupon issuing machine, for example.

Next, the IC card 20, the use of which is assumed in the embodiment, is described hereinafter.

<2. Explanation of IC Card Related to the Present Invention>

[2-1. Appearance of IC Card]

FIG. 2 is a schematic view showing an appearance of the IC card 20. Referring to FIG. 2, the IC card 20 includes an operating unit 42 and a display unit 60 on its outside.

The display unit 60 is configured as a display device using an LCD (Liquid Crystal Display), an OLED (Organic Light Emitting Diode) or the like, for example. The display unit 60 displays data read from memory of the IC card 20 based on control by a control unit (not shown) placed inside the IC card 20.

The operating unit 42 serves as an operating means capable of switching display contents on the display unit 60 according to a potential difference caused by photoelectric conversion. For example, the operating unit 42 may be configured as a set of solar batteries in which eight cells 24 a to 24 h are connected in series as shown in FIG. 2. An electromotive force of each cell of the solar battery is determined according to the load and the amount of light received. Therefore, if a user covers any of such cells with a finger, a change occurs in potential difference according to an electromotive force of each cell, and the IC card 20 can recognize the operation by the user. For example, if the cell 24 g and the cell 24 h are covered in the arrangement of the cells in FIG. 2, the IC card 20 may switch the display contents on the display unit 60 in a particular direction (e.g. “next” etc.). Further, if the cell 24 a and the cell 24 b are covered, the IC card 20 may switch the display contents on the display unit 60 in the opposite direction (e.g. “back” etc.). The arrangement of the cells in the operating unit 42 is not limited to such an example. For example, an operation of either one direction of “next” or “back” may be recognizable in the operating unit 42.

Further, the operating unit 42 also serves as a power generating means that generates a power for driving the display unit 60, as further described later.

The appearance of the IC card 20 is not limited thereto. For example, the size, position, orientation or the like of the operating unit 42 or the display unit 60 may be varied in any way according to use of the IC card 20.

The surfaces of the cells 24 a to 24 h of the operating unit 42 are preferably covered with a protective film for preventing scratches or breakage due to external contact or stimulus. In this case, by using a light collecting material as a material of the protective film, an electromotive force of each cell by photoelectric conversion increases, which improves the continuous display time or the allowable power consumption of the display unit 60.

The IC card 20 has the internal configuration shown in FIG. 3, which is described hereinbelow.

[2-2. Internal Configuration of IC Card]

FIG. 3 is a block diagram showing an example of a configuration of the IC card 20. Referring to FIG. 3, the IC card 20 includes an antenna 28, an IC card module 30, a first power generating unit 34, an operating unit (second power generating unit) 42, a power accumulating unit 44, a switch 46 and a display module 50. The IC card module 30 includes a wireless communication unit 32, a modulation/demodulation unit 36, a card CPU (Central Processing Unit) 38, and card memory 40. The display module 50 includes an internal communication I/F (interface) 52, a display CPU 54, display memory 56, a device driver 58 and a display unit 60.

In the case that the IC card 20 receives a signal, an electromagnetic wave received by the antenna 28 is amplified by the wireless communication unit 32 of the IC card module 30 and supplied to the modulation/demodulation unit 36. The modulation/demodulation unit 36 performs envelope detection of the modulated wave (ASK-modulated wave) supplied from the wireless communication unit 32 and demodulates the modulated wave according to BPSK (Binary Phase Shift Keying) or the like. Then, the modulation/demodulation unit 36 outputs an input signal obtained by demodulation to the card CPU 38. The card CPU 38 controls the operation of the IC card module 30 as a whole. For example, the card CPU 38 records the data contained in the input signal onto a prescribed write location of the card memory 40 or outputs an execution result of a prescribed command designated by the input signal to the modulation/demodulation unit 36. The card memory 40 records a program to be executed by the card CPU 38, control data, application data such as electronic ticket information or the like with use of semiconductor memory such as ROM or flash memory, for example.

In the case that the IC card 20 transmits a signal, an output signal is output from the card CPU 38 to the modulation/demodulation unit 36. The output signal contains data read from the card memory 40, an execution result of a prescribed command or the like, for example. The modulation/demodulation unit 36 modulates the output signal according to BPSK or the like, for example, and generates an ASK-modulated wave. Then, the modulation/demodulation unit 36 outputs the generated modulated wave to the wireless communication unit 32. The wireless communication unit 32 supplies the modulated wave input from the modulation/demodulation unit 36 to the antenna 28, and the output signal is transmitted from the antenna 28 by emission of an electromagnetic wave.

The first power generating unit 34 resonates the electromagnetic wave received by the antenna 28 with use of an LC circuit composed of the antenna 28 and a capacitor (not shown), for example. The first power generating unit 34 then rectifies an excited alternating-current magnetic field, stabilizes it by a voltage regulator or the like, and supplies it as a power of a direct-current power supply to the IC card module 30, for example.

Meanwhile, the operating unit 42 is an operating means based on a potential difference caused by photoelectric conversion and also serves as a power generating means with use of a solar battery, for example, as described earlier with reference to FIG. 2. Specifically, the operating unit 42 photoelectrically converts externally received light (sunlight or light emitted from another light source) to generate a power, and supplies the generated power to the power accumulating unit 44, for example.

Further, the operating unit 42 detects a potential difference corresponding to an electromotive force of each of the cells 24 a to 24 h shown in FIG. 2 and recognizes an operation by a user. Then, the operating unit 42 outputs an operating signal indicating descriptions of the detected operation to the display CPU 54. The operating signal may be a signal designating “next” or “back” as a direction to switch the display contents on the display unit 60, for example.

The power accumulating unit 44 accumulates the power supplied from the operating unit (second power generating unit) 42 with use of a capacitor or the like, for example. The power accumulating unit 44 then supplies the accumulated power to the display module 50 and thereby drives the display module 50. The power accumulating unit 44 also supplies the accumulated power to the switch 46.

The switch 46 switches between an access from the display module 50 to the IC card module 30 and an access from the outside (the outside of the IC card 20) to the IC card module 30. For example, the switch 46 blocks an access from the display module 50 to the IC card module 30 when the antenna 28 receives an electromagnetic wave emitted from the information processing device 10 shown in FIG. 1. Further, for example, the switch 46 permits an access from the display module 50 to the IC card module 30 when the switch 46 receives power supply from the power accumulating unit 44 in the state where the antenna 28 does not receive an electromagnetic wave.

The display CPU 54 of the display module 50 executes a program stored in ROM (not shown) or the like, for example, and controls the operation of the display module 50 as a whole. For example, the display CPU 54 accesses the IC card module 30 through the internal communication I/F 52 and acquires the data recorded on the card memory 40. Further, the display CPU 54 records the acquired data as display data onto the display memory 56. Furthermore, the display CPU 54 acquires the display data from the display memory 56 at predetermined timing such as activation of the display module 50, for example, and displays the acquired display data on the display unit 60.

The internal communication I/F 52 allows an access from the display CPU 54 to the IC card module 30 by generating a signal equal to a command to be provided from the IC card module 30 to an external device, for example. The display CPU 54 can thereby acquire the data recorded on the card memory 40.

The display memory 56 stores control data, display data acquired from the card memory 40 by the display CPU 54 or the like, with use of semiconductor memory such as ROM or flash memory, for example. The descriptions of data recorded on the display memory 56 are described more specifically later.

The device driver 58 drives the display unit 60, which is a display device mounted on the IC card 20, according to control by the display CPU 54.

The display unit 60 is configured as a display device using an LCD or the like as described earlier with reference to FIG. 2. The display unit 60 displays the display data acquired from the display memory 56 by the display CPU 54, for example, on its screen.

The appearance and the internal configuration of the IC card 20, the use of which is assumed in the embodiment of the present invention, are described above with reference to FIGS. 2 and 3. As is understood from the above description, the IC card module 30 of the IC card 20 receives power supply and operates only while the antenna 28 is receiving an electromagnetic wave. On the other hand, the display module 50 of the IC card 20 can display data on the display unit 60 with use of a power accumulated in the power accumulating unit 44 even if the IC card 20 is located in a place away from a reader/writer such as the information processing device 10 shown in FIG. 1, for example.

Although the case where the IC card 20 is a contactless IC card is described above by way of illustration, the IC card 20 is not limited to a contactless IC card. If the IC card 20 is a contact IC card, a terminal and a communication unit, instead of the antenna 28 and the wireless communication unit 32, may be mounted on the IC card 20, for example.

[2-3. Exemplary Data Structure]

A structure of data related to the embodiment, among data recorded on the card memory 40 and the display memory 56 of the IC card 20, is described hereinafter.

(1) Exemplary Data Structure of Card Memory

FIG. 4 is an explanatory view showing an example of a partial data structure of data recorded on the card memory 40 shown in FIG. 3.

Referring to FIG. 4, display request data is recorded at addresses X0 to X5, response control data is recorded at an address X6, application data 1 to application data M are recorded at addresses Y0 to T5 and subsequent addresses, respectively on the card memory 40.

The display request data is data for making a request for display from the IC card module 30 (or an external device) to the display module 50. In response to an instruction from an external device, the card CPU 38 of the IC card module 30 writes the display request data related to given application such as an electronic ticket or an electronic coupon to the addresses X0 to X5. The display request data may be any data that can be displayed on the display unit 60 of the display module 50, such as text data or bitmap data, for example.

The response control data is data for controlling a display request from the IC card module 30 to the display module 50 and a response. For example, in response to an instruction from an external device, the card CPU 38 of the IC card module 30 writes data requested to be displayed as the display request data and further writes a prescribed bit string designating acquisition of the display request data by the display module 50 as the response control data. Further, the display CPU 54 of the display module 50 writes a prescribed bit string indicating a success of acquisition of the display request data as the response control data when acquisition of the display request data succeeds, for example. Meanwhile, the display CPU 54 writes a prescribed bit string (error code) indicating a failure of acquisition of the display request data as the response control data when acquisition of the display request data fails, for example. The kind of an error (a data length error, a command error etc.) may be identifiable by the value of an error code, for example.

With use of such response control data, the status of data coordination between the IC card module 30 and the display module 50 is shared with an external device. It is thereby possible to prevent data inconsistency between the IC card module 30 and the display module 50 by inhibiting writing new data from an external device until acquisition of the display request data by the display module 50 is completed, for example.

The application data 1 through the application data M are arbitrary data related to various applications provided by the IC card 20. The application data 1 through the application data M may contain balance information, electronic ticket information, coupon information or the like, for example, as described earlier.

The balance information that is likely to be used in common by a plurality of applications may be held at a particular address which is different from the application data 1 to the application data M, not restricted to the example of FIG. 4. Further, the card memory 40 may store any data other than the data shown in FIG. 4.

(2) Exemplary Data Structure of Display Memory

FIG. 5 is an explanatory view showing an example of a data structure of data recorded on the display memory 56 shown in FIG. 3.

Referring to FIG. 5, a card identifier is recorded at an address 01, display control data is recorded at an address 02, a display sequence table is recorded at an address 03, and display data 1 to display data N are recorded at addresses K0 to K5 and subsequent addresses, respectively on the display memory 56.

The card identifier is an identifier for identifying an individual piece of the IC card module 30 to be accessed by the display module 50. Generally, when an external device makes an access to the IC card, a polling command is issued from the external device, and the card identifier is acquired in response thereto. The external device can thereby identify the IC card to be communicated with from a plurality of IC cards. On the other hand, in this embodiment, a combination of the IC card module 30 and the display module 50 that are incorporated in the IC card 20 is fixed. Thus, by recording the card identifier that identifies an individual piece of the IC card module 30 onto the display memory 56 in advance, it is possible to eliminate the polling processing and thereby reduce the power consumption and the processing time in the IC card 20. The card identifier may be acquired by a polling command upon initial startup after the display module 50 is incorporated into the IC card 20, or may be written by a manufacturing device during manufacture.

The display control data is data for controlling display processing by the display module 50. For example, the display control data contains data such as a memory address at which the response control data is stored in the card memory 40 of the IC card module 30.

The display sequence table defines in what sequence the display data 1 to the display data N at the addresses K0 to K5 and subsequent addresses are displayed on the display unit 60. The display sequence table may be data that lists the addresses (or block numbers etc.) of the display data 1 to the display data N in the sequence of displaying the data on the display unit 60, for example. Further, the display sequence table may contain data that defines the kind of display sequence such as a sequence of memory or a sequence of date. Furthermore, the display sequence table may contain an address of initial display data to be displayed initially on the display unit 60. A plurality of display sequence tables may be recorded on the display memory 56. In this case, serial numbers may be assigned to the respective display sequence tables, for example, and a display sequence of data on the display unit 60 may be selected as appropriate from a plurality of patterns.

The display data 1 to the display data N are data that can be displayed on the display unit 60. As described earlier, the display CPU 54 records the display request data acquired from the card memory 40 of the IC card module 30 as display data onto any memory location of the display data 1 to the display data N. Then, the display data is read by the display CPU 54 in the sequence according to the display sequence table and displayed on the display unit 60.

An example of the data structure of data that can be recorded on the card memory 40 and the display memory 56 of the IC card 20 is described above with reference to FIGS. 4 and 5. Hereinafter, display processing executed by the IC card 20 is described.

[2-4. Display Processing by IC Card]

FIG. 6 is a sequence chart showing an example of a flow of display processing by the IC card 20. FIG. 6 shows processing after writing of data from an external device such as a reader/writer to the IC card 20 is started until the data is displayed on the display unit 60 of the IC card 20.

Referring to FIG. 6, the external device first acquires the response control data from the card memory 40 in the IC card module 30 and checks whether the display request data that is not yet captured into the display module 50 remains or not (S102). If the response control data indicates that there remains the uncaptured display request data, the external device cancels the subsequent processing. On the other hand, if there is no uncaptured display request data remaining, the display request data is written to the card memory 40 of the IC card module 30 in response to an instruction from the external device (S104). For efficient processing, it is suitable to write the application data corresponding to the display request data simultaneously to the card memory 40.

Further, the external device updates the response control data on the card memory 40 to a prescribed bit string that designates data acquisition by the display module 50 (S106). After that, the external device stops emission of an electromagnetic wave from its own device and waits for acquisition of the display request data by the display module 50 (S108).

After that, when the operating unit (second power generating unit) 42 of the IC card 20 receives light and a power high enough to drive the display module 50 is accumulated in the power accumulating unit 44, the display module 50 is activated (S120). Then, the display CPU 54 of the display module 50 accesses the IC card module 30 and acquires the response control data recorded on the card memory 40 (S122). The display CPU 54 then determines whether new display request data is written or not by referring to the bit string of the response control data (S124). If the new display request data is not written, the processing in the subsequent steps S126 and S128 is skipped. If, on the other hand, the new display request data is written, the display CPU 54 accesses the IC card module 30 and acquires the display request data recorded on the card memory 40 (S126). Further, if the display CPU 54 successfully acquires the display request data, the display CPU 54 updates the response control data on the card memory 40 to a prescribed bit string that indicates a success of acquisition of the display request data (S128). Then, the display CPU 54 reads the display sequence table from the display memory 56 (S130) and displays the display data 1 to N on the display unit 60 sequentially according to the display sequence table (S132). At this time, if the display CPU 54 detects that an operation designating switching of display contents is performed through the operating unit 42, the display CPU 54 switches the display data being displayed on the display unit 60 into other display data.

Compared to communication processing from S122 to S128 by the display module 50, a high processing speed is not demanded for display processing after S130. For example, while a processing speed of communication processing is about several tens of MHz, a processing speed of display processing can be about several tens of kHz. Therefore, the display module 50 can save power consumption by temporarily increasing a processing clock speed during the steps S122 to S128 only.

The IC card 20 can thereby display the data written from the external device for a user. By using the information processing device 10 according to an embodiment of the present invention, which is described hereinbelow, as the external device, it is possible to display the information written to the IC card 20 on the display unit 60 of the IC card 20 without demanding an operation by a user.

<3. Configuration of Information Processing Device According to an Embodiment>

FIG. 7 is a block diagram showing an example of a configuration of the information processing device 10 according to an embodiment of the present invention.

Referring to FIG. 7, the information processing device 10 includes a display unit 14, a key input unit 16, a control unit 110, memory 112, a modulation/demodulation unit 114, a wireless communication unit 116, an antenna 118, a light emitting unit 120 and a light emission adjusting unit 122.

The control unit 110 executes a program recorded on the memory 112, for example, by using an processing unit such as a CPU or an MPU, and thereby controls the operation of the information processing device 10 as a whole. For example, the control unit 110 transmits a prescribed data write command to the IC card 20 through the modulation/demodulation unit 114, the wireless communication unit 116 and the antenna 118. The function of the control unit 110 related to features of the information processing device 10 according to the embodiment is described more specifically later. The memory 112 stores a program to be executed by the control unit 110, control data or the like by using semiconductor memory such as ROM or flash memory, for example.

The modulation/demodulation unit 114, the wireless communication unit 116 and the antenna 118 serve as a communication module by which the information processing device 10 transmits a prescribed command to the IC card 20 and the information processing device 10 receives a response from the IC card 20.

For example, in the case that the information processing device 10 writes data to the IC card 20, an output signal that contains a command designating data writing and data is output from the control unit 110 to the modulation/demodulation unit 114. The modulation/demodulation unit 114 modulates the output signal according to BPSK or the like, for example, and generates an ASK-modulated wave. Then, the modulation/demodulation unit 114 outputs the generated modulated wave to the wireless communication unit 116. The wireless communication unit 116 supplies the modulated wave input from the modulation/demodulation unit 114 to the antenna 118, and the output signal is transmitted from the antenna 118 by emission of an electromagnetic wave.

Further, in the case that the information processing device 10 reads data from the IC card 20, a command designating data reading is transmitted to the IC card 20, as in the case of data writing described above. Then, a response signal containing prescribed data is transmitted by return from the IC card 20 and received by the antenna 118. Then, the response signal (ASK-modulated wave) received by the antenna 118 is amplified by the wireless communication unit 116 and supplied to the modulation/demodulation unit 114. The modulation/demodulation unit 114 performs envelope detection of the modulated wave supplied from the wireless communication unit 116 and demodulates the modulated wave according to BPSK or the like. Then, the modulation/demodulation unit 114 outputs the demodulated response signal to the control unit 110.

The light emitting unit 120 supplies light to an operating means that is mounted on the IC card held by the IC card holding unit 12 shown in FIG. 1 and is capable of switching display contents on the display unit of the IC card by a potential difference occurring due to photoelectric conversion. The operating means of the IC card corresponds to the operating unit (second power generating unit) 42 of the IC card 20, which is described earlier with reference to FIG. 2, for example. Specifically, the light emitting unit 120 includes a light emitting element such as an LED (Light Emitting Diode) or a light emitter such as a fluorescent tube or an electric bulb, for example, which is capable of applying light to the operating unit 42 of the IC card 20 that is held by the IC card holding unit 12, for example. Then, the light emitting unit 120 applies light to the operating means of the IC card according to control by the light emission adjusting unit 122, which is described later, and drives the display module of the IC card.

Further, the light emitting unit 120 can supply light to the operating means by a first light emitting pattern that drives the display unit of the IC card and a second light emitting pattern that switches display contents of the display unit of the IC card.

FIG. 8 is a schematic view showing the IC card 20 being held by the IC card holding unit 12 of the information processing device 10.

Referring to FIG. 8, the IC card 20 is inserted into the IC card holding unit 12 of the information processing device 10. At this time, the position of the IC card 20 is adjusted in such a way that the display unit 60 is visible for a user of the information processing device 10 and external light does not reach the operating unit 42.

FIG. 9 is a schematic view showing the state where the inside of the IC card holding unit 12 is viewed from the direction A of FIG. 8.

Referring to FIG. 9, the IC card 20 that is held by the IC card holding unit 12 of the information processing device 10 is shown with the surface having the operating unit 42 (which is referred to hereinafter as an operating surface) facing up.

In FIG. 9, the operating unit 42 is divided into three operating sections 42 a, 42 b and 42 c. The first operating section 42 a corresponds to the cell 24 g and the cell 24 h of the operating unit 42 shown in FIG. 2, for example. The second operating section 42 b corresponds to the cell 24 c to the cell 24 f of the operating unit 42 shown in FIG. 2, for example. The third operating section 42 c corresponds to the cell 24 a and the cell 24 b of the operating unit 42 shown in FIG. 2, for example.

On the other hand, a plurality of light emitting elements included in the light emitting unit 120 are placed on the surface on the inside of the IC card holding unit 12 of the information processing device 10 which is placed opposite to the operating surface of the IC card 20. The light emitting elements are divided into three light emitting sections 120 a, 120 b and 120 c by dividers 18 a and 18 b. The first light emitting section 120 a is placed opposite to the first operating section 42 a of the IC card 20. The second light emitting section 120 b is placed opposite to the second operating section 42 b of the IC card 20. The third light emitting section 120 c is placed opposite to the third operating section 42 c of the IC card 20.

With such three light emitting sections 120 a, 120 b and 120 c, the light emitting unit 120 can apply light to the operating unit 42 of the IC card 20 with a prescribed light emitting pattern so as to switch the contents displayed on the display unit 60 of the IC card 20.

In FIG. 9, the divider 18 a is placed in order that light from the first light emitting section 120 a does not reach the second operating section 42 b, and light from the second light emitting section 120 b does not reach the first operating section 42 a. Likewise, the divider 18 b is placed in order that light from the second light emitting section 120 b does not reach the third operating section 42 c, and light from the third light emitting section 120 c does not reach the second operating section 42 b.

FIG. 10 is an explanatory view to describe a relationship between light emitting patterns by the light emitting unit 120 and details of an operation detected by the operating unit 42 of the IC card 20.

Referring to FIG. 10, four light emitting patterns A to D are defined. The light emitting pattern A indicates the state where all of the first light emitting section 120 a, the second light emitting section 120 b and the third light emitting section 120 c are lighting up. In this pattern, light is applied to all the operating sections 42 a to 42 c of the operating unit 42 of the IC card 20, and therefore the IC card 20 can drive the display unit 60 by using a power generated by the operating unit 42.

The light emitting pattern B indicates the state where the first light emitting section 120 a is lighting off and the second light emitting section 120 b and the third light emitting section 120 c are lighting up. In this pattern, light is not applied to the first operating section 42 a of the operating unit 42 of the IC card 20, and light is applied to the second operating section 42 b and the third operating section 42 c of the operating unit 42 of the IC card 20. This is the same state as when the cell 24 g and the cell 24 h are covered in the operating unit 42 of the IC card 20, and the IC card 20 switches the display contents on the display unit 60 in the direction of “next”, for example.

The light emitting pattern C indicates the state where the first light emitting section 120 a and the second light emitting section 120 b are lighting up, and the third light emitting section 120 c is lighting off. In this pattern, light is applied to the first operating section 42 a and the second operating section 42 b of the operating unit 42 of the IC card 20, and light is not applied to the third operating section 42 c of the operating unit 42 of the IC card 20. This is the same state as when the cell 24 a and the cell 24 b are covered in the operating unit 42 of the IC card 20, and the IC card 20 switches the display contents on the display unit 60 in the direction of “back”, for example.

The light emitting pattern D indicates the state where all of the first light emitting section 120 a, the second light emitting section 120 b and the third light emitting section 120 c are lighting off. In this pattern, light is not applied to any of the operating sections 42 a to 42 c of the operating unit 42 of the IC card 20, and therefore the IC card 20 cannot drive the display unit 60 unless a power accumulated in the power accumulating unit 44 remains, for example.

FIG. 10 shows the case of controlling supply of light to the IC card 20 by turning on or off the light emitting elements included in the light emitting unit 120 with respect to each light emitting section. However, a method of controlling supply of light to the IC card 20 is not limited thereto. For example, a shutter may be placed at the front of each light emitting section, and supply of light to the IC card 20 may be controlled by opening or closing the shutter.

The number, shape and position of light emitting sections of the light emitting unit 120 and the number of dividers can be set according to the specifications of the number, shape and position of operating sections of the operating unit 42 of the IC card 20 or the like. For example, if only the “next” operation is recognizable in the operating unit 42, the number of light emitting sections of the light emitting unit 120 may be two, and the number of dividers may be one. Further, a plurality of light emitting patterns may be prepared for one operation in order to be compatible with use of a plurality of different IC cards in the information processing device 10, for example.

Referring back to FIG. 7, an example of a logical configuration of the information processing device 10 is further described.

The light emission adjusting unit 122 allows the data recorded on the IC card 20 by the control unit 110 through the modulation/demodulation unit 114, the wireless communication unit 116 and the antenna 118 to be displayed on the display unit 60 of the IC card 20 by adjusting the number of times of emitting light or the light emitting pattern from the light emitting unit 120. Specifically, after the control unit 110 records given data onto the IC card 20, the light emission adjusting unit 122 acquires information about a write location for the data on the memory of the IC card 20 from the control unit 110. Then, the light emission adjusting unit 122 determines the number of times of emitting light or the light emitting pattern from the light emitting unit 120 according to the acquired write location. After that, the light emission adjusting unit 122 causes the light emitting unit 120 to supply light to the IC card 20 by the determined number of times of emitting light or light emitting pattern. As a result, the contents displayed on the display unit 60 of the IC card 20 are switched to the data recorded on the IC card 20 by the control unit 110. A user can thereby check the data written to the IC card 20 by looking at the display unit 60 of the IC card 20 without taking off the IC card 20 from the information processing device 10 for operation. The function of the light emission adjusting unit 122 described above may be directly executed by the control unit 110.

Further, while the control unit 110 performs communication with the IC card 20 through the modulation/demodulation unit 114, the wireless communication unit 116 and the antenna 118, the light emission adjusting unit 122 stops supply of light from the light emitting unit 120 to the IC card 20 by applying the light emitting pattern D of FIG. 10, for example. Likewise, while light is supplied from the light emitting unit 120 to the IC card 20 under control of the light emission adjusting unit 122, the control unit 110 stops communication with the IC card 20. It is thereby possible to prevent the occurrence of inconsistency of processing error or data within the IC card 20 due to simultaneous access to the IC card module 30 between the display module 50 and the external device (the information processing device 10) in the IC card 20.

The configuration of the information processing device 10 according to the embodiment of the present invention is described above with reference to FIGS. 7 to 10. An example of a flow of display switching processing that is executed in such a configuration is described hereinbelow.

<4. Flow of Display Switching Processing According to an Embodiment>

FIG. 11 is a flowchart showing an example of a flow of display switching processing by the information processing device 10 according to the embodiment of the present invention. The following description is based on an assumption that the IC card 20 has a function of displaying electronic ticket information and a user issues a new electronic ticket to the IC card 20 with use of the information processing device 10, which is a reader/writer.

Referring to FIG. 11, when an instruction for data writing to the IC card 20 is input by a user through the key input unit 16, for example, the light emission adjusting unit 122 turns off all the light emitting elements of the light emitting unit 120 and thereby stops supply of light to the IC card 20 (S202).

Next, the control unit 110 transmits a command to the IC card 20 and acquires the contents in the memory from the card memory 40 in the IC card 20 (S204). The contents of the memory contains electronic ticket information that has been recorded, response control data (cf. S102 of FIG. 6) for confirming that there is no uncaptured display request data remaining and so on.

If no uncaptured display request data remains, the control unit 110 determines a write location on the card memory 40 for writing new electronic ticket information based on the acquired memory contents (S206). The write location may be a location indicating an arbitrary free space in an electronic ticket information storage area in the card memory 40, for example.

Then, the control unit 110 transmits a command to the IC card 20 and writes new electronic ticket information to the write location on the card memory 40 which is determined in the step S206 (S208). In this step, a response containing a status indicating whether writing of the new electronic ticket information succeeds or not is transmitted by return from the IC card 20.

If writing of the electronic ticket information succeeds, the control unit 110 writes data to be displayed related to the issued electronic ticket information as the display request data to the card memory 40 of the IC card 20 and further updates the response control data to a prescribed bit string (S210). The step S210 in the flowchart of FIG. 11 corresponds to the steps S104 and S106 of display processing by the IC card 20 which is described earlier with reference to FIG. 6. The control unit 110 then stops communication with the IC card 20 (S212).

After that, the light emission adjusting unit 122 acquires the write location for the new electronic ticket information from the control unit 110 and determines the number of times of emitting light and the light emitting pattern for light supply from the light emitting unit 120 to the IC card 20 (S214). It is assumed, for example, that the write location is the m-th location in the electronic ticket information write area on the card memory 40, and the display module 50 of the IC card 20 displays the electronic ticket information simply in the sequence of memory. In this case, the light emission adjusting unit 122 determines to repeat light emission by the light emitting pattern B and the light emitting pattern A alternately m number of times after light emission by the light emitting pattern A shown in FIG. 10. Alternatively, the light emission adjusting unit 122 may acquire the contents of the display sequence table acquired from the IC card 20 by the control unit 110, for example, and determine the number of times of emitting light and the light emitting pattern according to the contents of the display sequence table.

Then, the light emission adjusting unit 122 sequentially repeats light emission by the light emitting unit 120 according to the determined number of times of emitting light and light emitting pattern (S216). For example, the light emission adjusting unit 122 first supplies light to all the operating sections 42 a to 42 c of the IC card 20 by the light emitting pattern A. A power is thereby accumulated in the power accumulating unit 44 of the IC card 20, and the display module 50 is activated. Then, the display request data on the card memory 40 is captured onto the display memory 56 by the display CPU 54. At this time, the initial display data, for example, is displayed on the display unit 60 of the IC card 20. Next, the light emission adjusting unit 122 repeats light emission by the light emitting pattern B (display switch “next”) and light emission by the light emitting pattern A (all light-up) m number of times and switches the display contents on the display unit 60 of the IC card 20 to the m-th electronic ticket information. A user can thereby confirm that the new electronic ticket information is normally captured into the display module 50 of the IC card 20 without need for a particular operation.

In the step S216, there is a possibility that an error in which the display contents on the display unit 60 of the IC card 20 cannot be switched an appropriate number of times occurs due to delay of sampling a potential difference in the operating unit 42 of the IC card 20, for example. In light of this, the information processing device 10 may be configured in such a way that a user can further given an instruction for supply of light from the light emitting unit 120 with a prescribed light emitting pattern through the key input unit 16 of the information processing device 10, for example. A user can thereby confirm whether data writing is normally completed or not without taking off the IC card 20 from the information processing device 10, even when the above error occurs, by giving a supplementary instruction.

<5. Summary>

The configuration of the information processing device 10 according to the embodiment of the present invention is described above with reference to FIGS. 1 to 11. Principal features of the information processing device 10 according to the embodiment are as follows.

[5-1. Principal Features of the Embodiment]

According to the embodiment, the information processing device 10 includes the modulation/demodulation unit 114, the wireless communication unit 116 and the antenna 118 for transmitting given data to the IC card 20 for causing the IC card 20 to record the data thereon and the light emitting unit 120 for driving the display module 50 of the IC card 20. In this configuration, the information processing device 10 can seamlessly execute writing of data and display of written data with the IC card 20 being held by the IC card holding unit 12.

Further, the light emission adjusting unit 122 of the information processing device 10 allows the data recorded on the IC card 20 to be automatically displayed on the display unit 60 of the IC card 20 by adjusting the number of times of emitting light and the light emitting pattern from the light emitting unit 120. A user can thereby confirm the information written to the IC card 20 without a particular operation.

Furthermore, the light emission adjusting unit 122 stops supply of light from the light emitting unit 120 while the information processing device 10 writes data onto the IC card 20. Likewise, the control unit 110 stops communication with the IC card 20 while light is supplied to the IC card 20 from the light emitting unit 120. It is thereby possible to prevent the occurrence of inconsistency of processing error or data by the IC card 20 due to simultaneous access to the IC card module 30 between the display module 50 and the information processing device 10.

Other features of the information processing device 10 different from those described above also contribute to merits such as improvement of the convenience or improvement of the safety of processing which are provided by the information processing device 10 according to the embodiment, as a matter of course.

[5-2. Exemplary Applications]

In this embodiment, the case where data is written from the information processing device 10 to the IC card 20 is mainly described, taking issuing of an electronic ticket as an example. However, the information processing device 10 according to the embodiment may be also applied to the case where a user confirms the data already written to the IC card 20, such as when inspecting an issued electronic ticket, for example. Specifically, the control unit 110 of the information processing device 10 first reads the contents of the card memory 40 of the IC card 20 and specifies the location of an electronic ticket to be inspected on the memory. Then, after stopping communication, light is supplied from the light emitting unit 120 to the IC card 20 by the number of times of emitting light or the light emitting pattern that is adjusted by the light emission adjusting unit 122. The data of the issued electronic ticket that is recorded on the IC card 20 is thereby displayed on the display unit 60 of the IC card 20, and a user can inspect the electronic ticket by looking at the display.

Further, in this embodiment, the case where a user checks the data displayed on the display unit 60 of the IC card 20 by visual inspection is described. The information processing device 10 may include an image processing unit that images the data displayed on the display unit 60 of the IC card 20 by an imaging device that is additionally mounted and then automatically verifies data on the captured image against the data written to the IC card 20. For example, the image processing unit may determine match or mismatch between a picture image created from the data written to the IC card 20 and the captured image by pattern matching. Further, the image processing unit may determine match or mismatch by comparing textual information extracted from the captured image and the data written to the IC card 20, for example. In this case, a result of automatic verification (writing success or failure) can be displayed on the display unit 14 shown in FIG. 1, for example. This eliminates the need for visual check by a user, which further enhances the convenience for a user.

Although the case where the information processing device 10 is a portable reader/writer is mainly described above, the information processing device 10 may be any of a portable type and a stationary type. Likewise, although the case where the IC card 20 is a contactless IC card is mainly described above, the IC card 20 may be any of a contact type and a contactless type.

Further, a series of processing by the information processing device 10 or the IC card 20 described above may be implemented by hardware or software. In the case of executing a series of or a part of processing by software, a program constituting the software is prestored in ROM, loaded to RAM upon execution and then executed by a CPU.

It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.

For example, it is not necessary to perform the display switching processing according to the embodiment described with reference to FIG. 11 in accordance with the sequence shown in the flowchart. Each step may include processing which is executed in parallel or individually.

The present application contains subject matter related to that disclosed in Japanese Priority Patent Application JP 2008-302994 filed in the Japan Patent Office on 27 Nov. 2008, the entire content of which is hereby incorporated by reference. 

1. An information processing device comprising: a light emitting unit to supply light to an operating means mounted on an IC card, the operating means switching display contents on a display unit of the IC card by a potential difference occurring due to photoelectric conversion; a communication unit to transmit predetermined data to the IC card for causing the IC card to record the data; and a light emission adjusting unit that adjusts a number of times of emitting light or a light emitting pattern from the light emitting unit to correspond to a memory address of a memory on the IC card, the light supplied from the light emitting unit, upon irradiation on the operation means, causing the data recorded on the IC card to be retrieved from the memory in accordance with the memory address, the retrieved data displayed on the IC card or causing a current display of the IC card to be changed.
 2. The information processing device according to claim 1, wherein the light emitting unit is capable of supplying light to the operating means by a first light emitting pattern for driving the display unit of the IC card and a second light emitting pattern for switching display contents on the display unit of the IC card.
 3. The information processing device according to claim 2, further comprising: an IC card holding unit to hold the IC card at a position where light can be supplied from the light emitting unit to the operating means of the IC card and the display unit of the IC card is visible from outside.
 4. The information processing device according to claim 3, further comprising: a control unit to determine a write location for the data on the memory of the IC card based on contents of the memory read from the IC card through the communication unit.
 5. The information processing device according to claim 4, wherein the light emission adjusting unit acquires the write location for the data from the control unit and determines the number of times of emitting light or the light emitting pattern from the light emitting unit according to the acquired write location.
 6. The information processing device according to claim 1, wherein the light emission adjusting unit stops supply of light from the light emitting unit while the communication unit communicates with the IC card.
 7. The information processing device according to claim 6, wherein the control unit stops communication between the communication unit and the IC card while light is supplied from the light emitting unit to the operating means of the IC card.
 8. The information processing device according to claim 1, further comprising: an image processing unit to determine whether writing of the data to the IC card succeeds or not by verifying an image obtained by imaging display contents displayed on the IC card against the data recorded on the IC card.
 9. A display switching method comprising the steps of: transmitting predetermined data to an IC card through a communication unit for causing the IC card to record the data; supplying light from a light emitting unit to an operating means mounted on the IC card for switching display contents on a display unit of the IC card by a potential difference occurring due to photoelectric conversion; and adjusting a number of times of emitting light or a light emitting pattern to correspond to a memory address of a memory on the IC card, the light supplied from the light emitting unit, upon irradiation on the operation means, causing the data recorded on the IC card to be retrieved from the memory in accordance with the memory address, the retrieved data displayed on the IC card or causing a current display of the IC card to be changed.
 10. A non-transitory computer readable storage medium having instructions stored therein, which when executed by a processor in an information processing device including a light emitting unit to supply light to an operating means mounted on an IC card, the operating means switching display contents on a display unit of the IC card by a potential difference occurring due to photoelectric conversion, causes the processor to instruct: a communication unit to transmit given data to the IC card for causing the IC card to record the data; and a light emission adjusting unit to adjust a number of times of emitting light or a light emitting pattern from the light emitting unit to correspond to a memory address of a memory on the IC card, the light supplied from the light emitting unit, upon irradiation on the operation means, causing the data recorded on the IC card to be retrieved from the memory in accordance with the memory address, the retrieved data displayed on the IC card or causing a current display of the IC card to be changed. 